3 * Licensed under GPLv2, see file LICENSE in this source tree.
6 You need to define the following (example):
9 #define xstrtou(rest) xstrtoul##rest
10 #define xstrto(rest) xstrtol##rest
11 #define xatou(rest) xatoul##rest
12 #define xato(rest) xatol##rest
13 #define XSTR_UTYPE_MAX ULONG_MAX
14 #define XSTR_TYPE_MAX LONG_MAX
15 #define XSTR_TYPE_MIN LONG_MIN
16 #define XSTR_STRTOU strtoul
19 unsigned type FAST_FUNC xstrtou(_range_sfx)(const char *numstr, int base,
22 const struct suffix_mult *suffixes)
28 /* Disallow '-' and any leading whitespace. */
29 if (*numstr == '-' || *numstr == '+' || isspace(*numstr))
32 /* Since this is a lib function, we're not allowed to reset errno to 0.
33 * Doing so could break an app that is deferring checking of errno.
34 * So, save the old value so that we can restore it if successful. */
37 r = XSTR_STRTOU(numstr, &e, base);
38 /* Do the initial validity check. Note: The standards do not
39 * guarantee that errno is set if no digits were found. So we
40 * must test for this explicitly. */
41 if (errno || numstr == e)
42 goto inval; /* error / no digits / illegal trailing chars */
44 errno = old_errno; /* Ok. So restore errno. */
46 /* Do optional suffix parsing. Allow 'empty' suffix tables.
47 * Note that we also allow nul suffixes with associated multipliers,
48 * to allow for scaling of the numstr by some default multiplier. */
50 while (suffixes->mult) {
51 if (strcmp(suffixes->suffix, e) == 0) {
52 if (XSTR_UTYPE_MAX / suffixes->mult < r)
53 goto range; /* overflow! */
61 /* Note: trailing space is an error.
62 It would be easy enough to allow though if desired. */
66 /* Finally, check for range limits. */
67 if (r >= lower && r <= upper)
70 bb_error_msg_and_die("number %s is not in %llu..%llu range",
71 numstr, (unsigned long long)lower,
72 (unsigned long long)upper);
74 bb_error_msg_and_die("invalid number '%s'", numstr);
77 unsigned type FAST_FUNC xstrtou(_range)(const char *numstr, int base,
81 return xstrtou(_range_sfx)(numstr, base, lower, upper, NULL);
84 unsigned type FAST_FUNC xstrtou(_sfx)(const char *numstr, int base,
85 const struct suffix_mult *suffixes)
87 return xstrtou(_range_sfx)(numstr, base, 0, XSTR_UTYPE_MAX, suffixes);
90 unsigned type FAST_FUNC xstrtou()(const char *numstr, int base)
92 return xstrtou(_range_sfx)(numstr, base, 0, XSTR_UTYPE_MAX, NULL);
95 unsigned type FAST_FUNC xatou(_range_sfx)(const char *numstr,
98 const struct suffix_mult *suffixes)
100 return xstrtou(_range_sfx)(numstr, 10, lower, upper, suffixes);
103 unsigned type FAST_FUNC xatou(_range)(const char *numstr,
107 return xstrtou(_range_sfx)(numstr, 10, lower, upper, NULL);
110 unsigned type FAST_FUNC xatou(_sfx)(const char *numstr,
111 const struct suffix_mult *suffixes)
113 return xstrtou(_range_sfx)(numstr, 10, 0, XSTR_UTYPE_MAX, suffixes);
116 unsigned type FAST_FUNC xatou()(const char *numstr)
118 return xatou(_sfx)(numstr, NULL);
123 type FAST_FUNC xstrto(_range_sfx)(const char *numstr, int base,
126 const struct suffix_mult *suffixes)
128 unsigned type u = XSTR_TYPE_MAX;
130 const char *p = numstr;
132 /* NB: if you'll decide to disallow '+':
133 * at least renice applet needs to allow it */
134 if (p[0] == '+' || p[0] == '-') {
137 ++u; /* = <type>_MIN (01111... + 1 == 10000...) */
140 r = xstrtou(_range_sfx)(p, base, 0, u, suffixes);
142 if (*numstr == '-') {
146 if (r < lower || r > upper) {
147 bb_error_msg_and_die("number %s is not in %lld..%lld range",
148 numstr, (long long)lower, (long long)upper);
154 type FAST_FUNC xstrto(_range)(const char *numstr, int base, type lower, type upper)
156 return xstrto(_range_sfx)(numstr, base, lower, upper, NULL);
159 type FAST_FUNC xstrto()(const char *numstr, int base)
161 return xstrto(_range_sfx)(numstr, base, XSTR_TYPE_MIN, XSTR_TYPE_MAX, NULL);
164 type FAST_FUNC xato(_range_sfx)(const char *numstr,
167 const struct suffix_mult *suffixes)
169 return xstrto(_range_sfx)(numstr, 10, lower, upper, suffixes);
172 type FAST_FUNC xato(_range)(const char *numstr, type lower, type upper)
174 return xstrto(_range_sfx)(numstr, 10, lower, upper, NULL);
177 type FAST_FUNC xato(_sfx)(const char *numstr, const struct suffix_mult *suffixes)
179 return xstrto(_range_sfx)(numstr, 10, XSTR_TYPE_MIN, XSTR_TYPE_MAX, suffixes);
182 type FAST_FUNC xato()(const char *numstr)
184 return xstrto(_range_sfx)(numstr, 10, XSTR_TYPE_MIN, XSTR_TYPE_MAX, NULL);
192 #undef XSTR_UTYPE_MAX